Combined type-writing and computing machine.



F. A. HART.

COMBINED TYPE wmmsc AND COMPUTING MAcHrNE.

APPLICA HON FILED DEC. 5. I914 1,231,01 8, Patented June 26,1917.

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Mm /4 WW F. A. HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED 050.5. I914 1 ,2 3 l ,0 1 8 Patented June 26, 1917.

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COMBINED TYPE WRIHNG AND COMPUTING MACHINE.

APPLICATION LSD DEB. 5, 1914. I w 1,231,018. Patented June 26, 1911.

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NVENTQR aw HM 4 ATTORN '[DIITED STATES PATENT OFFICE.

FREDERICK A. HART, 0F NEWARK, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Specification of Letters Patent.

Patented June 26, 1917.

Continuation in part of application Serial No. 596,451, filed December 9, 1910. This application filed December 5. 1914. Serial No. 875,554.

To all whom it may concern:

Beit known that I, FREDERICK A. HART, a citizen of the United States, residing in Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Combined Type- Writing and Computing Machines, of which the following is a specification.

My invention relates to a carriage return adapted especially to be used in typewriting machines, and is a continuation-of my copending application No. 596,451 filed De cember 9, 1910, as to all matter common thereto, and is in part an improvement thereon. In said co-pending application, the usual Underwood-Hanson combined typewriting and computing machine is shown as provided with a motor for driving it, said motor in that type of machine being effective on the computing mechanism only after all the digits of a number have been temporarily set up, and when so effective, the motor carries the set-up digits into the usual computing wheels.

In said application, the carriage of the typewriter is connected to the motor through part of the mechanism which is adapted to carry the set-up numbers into the computing wheels, and means are provided whereby the motor, which drives the said connecting parts through a uniform stroke, is ndapted'to return the typewriter carriage to a proper point at the beginning of a line, irrespective of the length of line written; and also where by the amount of said return may be easily, rapidly and positively adjusted.

In said application, the motor is illustrated as being positively driven. In the present application, I have shown a motor as one of the intermittent type, in which the motor is normally idle, but on depression of a starting key, immediately starts and moves certain parts through a predetermined and uniform stroke, then is disconnected from said. parts so that the'motor may run idly by its own inertia, but soon stops because the power has been completely cut off at the end of the eii'ective movement of the aforesaid parts. It will thus be seen that I have provided a device in which the motor is normally idle but which starts when it is desired to return the carriage, with the result that there is no waste of power When the motor is not actually being employed and further a device in which, when the motor has accomplished the maximum amount of work it may be called upon to do in returning the carriage, the motor is automatically cut off from its source of power, while at the same time, the return stroke of the carriage may be adj usted to suit the exigencies of the work in hand, at the will of the. typist.

. Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 1s a side view partly in section, of an Underwood Hanson typewriting and computing machlne showing only such parts as are convenient for the illustration of my invention as applied thereto.

Fig. 2 is a detail section of the same on an enlarged scale.

Fig. 3 is a section taken at right-angles to F1g. 2, showing thesame and adjacent parts.

F1g. 4 is a detail view showing in top plan, a key-controlled trip lever for operatmg the trip pm which controls the carriage return.

Fig. 5 is a section of the clutch shown in Fig. 1, but seen from the opposite side.

Fig, 6 is a view of the same showing the trip pm released to close the circuit through the motor.

Fig. 7 is a plan view of a pair of brushes and a device on which they are mounted.

Fig. 8 is a clutch-controlling member forming part of the clutch.

Fig. 9 is a perspective view of the circuitcontrolling member which is used for supporting and operating a rotating bridge, forming part of the clutch.

Fig. 10 is a plan view illustrating how the carriage returning belt operates the linespace mechanism.

In the usual Underwood-Hanson combined typewriting and computing machine, the printing keys 1 of the typewriter are on the front ends of key levers 2, which, when depressed by means of bell cranks 3, cause typeba-rs to swing upwardly and rearwardly to prlnt on a platen 5 in the usual manner. Said platen forms part of a typewriter carriage 6. which is drawn along by a spring barrel 7, and is under the control of the usual escape'ment dogs 8 and 9, whichare" operated by the usual universal bar 10, said universal bar being made effective by heels 11 on the=type-bars, as said bars approach the platen. At each operation of the universal bar 10, the dogs 8 and 9 alternately engage an escapement wheel 12, which is' concertain column by connections including a denominational dog 15, and other devices not shown herein, and not material to the present invention.

When a series of numbers has thus been set up, the operative depresses the starting key 16 to cause the numbers to be carried.

into the computing wheels, not shown here in, and at the same time, said key causes the typewriter carriage to be returned to the proper point for starting a new line' of writing. To accomplish these results, the machine is provided with a reciprocating eneral operator 17, which carries-the num ers into the computing .wheels as above described, and through connections presently to be described, ,draws on a belt 18-to draw back the typewriter carriage for the beginning of a new line To accomplish these results, the general operator is adapted tobe driven by an electric motor 19. This motor is usually of the shunt type, and in rotating, drives a shaft 20 by means of a slip clutch 21 adapted to slip when the motor is subjected to an overload, such as might occur from the jamming of the mechanism. Said slip clutch includes a disk 22 fast to the main shaft 23 of a the motor, said disk being effective on a driving disk 24, which includes a lug 25, said lug driving the shaft 20 by means of an arm 26, which is fast on said shaft 20 and extends across the disk 22 into the path of the lug 25. In order to provide for the necessary slipping under heavy load, a leather or fiber washer 27 is interposed between the disks 22 and 24 and sufficient friction is maintained between the disks 22-and 24 through said washer by means of a spring 28 coiled around the shaft 23 and adjustable as to tension by means of lock nuts 29.

When the motor is turning, it drives a worm wheel 30 forming part of a driving member of a clutch, the other part of said clutch being connected to drive the general operator 17 in a manner to be later described. To do this driving, the worm wheel 30 is provided with a hub-31 which is jour-' naled on a normally idle operating shaft 32, said shaft having fast thereto a cup carrier 35 which is normally held against rotationbymeansof a tripping pin 36, and

when thus held, the rolls 34 are held in ineffective position or non-gripping position. lVhen the motor is revolving, the roll carrier 35 tends toturn therewith, because of the frictionof the hub 31 on said roll carrier,

this friction being madecertain of operation, by friction .pins 37 which extend through the roll carrier so as to bear against the hub 31 .and are held againstsaidzhub by means of spring:.38 which is tightened 7 against their outer ends by a screw 39. The

result of thisstructure is that if the trip pin 36 be withdrawn while the motor is revolving, the roll carrier 35 starts to revolve with the motor. and carries the rolls from the position seenlinFig. 5 where :they are free of the-pockets 40, into the narrowportions i 41 of said pockets, where they are jammed between the hub 31 and the driven member 42 of the clutch, in which the pockets 40 are located. a i

In order that the motormay. only revolve when it is needed to drive the mechanism, the motorisrprovided with a normally open circuit, which goesthrough the clutch, and which circuit is closed whenever the trip pin 36 is withdrawn. For this purpose, the motor circuit iscarried into the clutch by conductors 43 and 44, said conductors cooperating with a rotary bridge 47 carried by the bridge-carrying member 45. This bridgecarrying member is built into the clutch and has an arm 46 which extends across an drawn, to automatically close the circuit, the

bridge member 45 is normally urged against sald pin 36 by means of a spring 48, let into an opening 49 in the roll-carrying member 35. -Whenever the pin 36 is withdrawn from the Fig. 5 position to the Fig. 6 position, as happens whenever the starting key 16 is depressed, the spring 48 swings the rotating bridge member 45 to close the circuit through the motor.

The circuit is normally open because the rotating bridge normally stands so that the conductor 43 through its brush 50 bears against an insulated portion 51 of the bridge 47. The swinging of the rotating bridge member by the spring 48 carries said bridge around so that the insulated portion 51 is carried clear of the brush 50 and the conducting portion of the bridge comes against said brush, with the result that the circuit is closed and the motor starts free of load for the moment. The starting of the motor closes the clutch in the manner described above where it is pointed out that the friction of the hub 31 of the worm wheel 30 carries the roll carrier 35 to gripping position. The roll carrier then carries around the rotating bridge with it by the arm 46 which, as described above, extends across the opening 46 in the-clutch member. At the end of one revolution of the worm wheel 30, the arm 46 is intercepted by the trip pin 36 which in the meantime, has-been dropped to effective'position by the typist, so that when the insulated portion 51 of the bridge comes opposite the conductor bridge 50, the circuit is again broken, and at the same time, the roll carrier 35 is arrested so that the rolls release the driven member of the clutch from the driving member. The motor may now continue-to run idly.

The clutch, through the cup 33 on the shaft 32, drives the general operator 17 by means of a yoke 52, which embraces an extension 53 on a slide 54, mounted to reciprocate in a casing 55, which surrounds the clutch. This slide includes a guide rod 56 at each end thereof, which reciprocates within extensions of said casing, as above shown in Fig. 2. Each guide rod 56 is provided with a. rabbet 57 to hold it against accidental rotation. This slide 54 is reciprocated by means of a crank arm 58 fast on the shaft 32, said crank arm being journaled at its outer end to a pivot 59 in a vertically reciprocating slide 60 working in ways formed in the slide 54, so that a rotation of the shaft 32 will move the slide 54 backward and forward by the rotation of the crank arm 58.

The starting key 16 is effective on the trip pin 36 through a lever 61 extending from the side of the machine toward the center where the pin 36 is located and pivoted between its ends at 62, so that the inner end 63 of said lever will rise when the outer end thereof is depressed, and in so rising, will lift the pin 36, by means of a yoke 64 formed on the upper end of said pin, in which the end 63 of said lever works. The pin 36 is normally held downward in its effective position by a flat spring 65 which presses on the top of its yoke. The starting 'ey 16 operates the lever 61 by means of a lever 66, pivoted at the rear of the machine at 67, and overlying, near its middle, an extension 68 adjustably fastened on the lever 61, so as to compensate for irregularities in construction of the two levers. The starting key 16 is held normally in its elevated position by means of a returning spring 69.

The general operator 17 when reciprocated by the motor 19, draws on the carriage returning belt 18 through a system of gears which are operated by an idle pinion 7 O meshing with a rack forming part of the side bar of" the general operator 17. The pinion 7O meshes with a segment 71 fast on a transverse shaft 72, said shaft having fast thereon acrank arm 73, carrying on its outer end a pinion 74 which may run idly on the gear wheel-75--journaled on the shaft 7 2. This Iastmamed gearwheel 75 draws on the belt 18 by a pinion 76, fast on the drum 77 to which said belt is attached. In order to vary the amount to which the belt 18 is driven, the mechanism is provided with means whereby after the pinion 74 is moved idly on the gear wheel 75 for a predetermined distance, it is locked thereto and then drives said gear wheel, thereby driving the drum 77, and so driving on the belt 18. To obtain this result, there is journaled on the shaft 72 but engaging the gear wheel 75 with considerable friction, a freely swinging arm 78-having journaled on its outer end a pinion 79 so that said pinion can be set at any'point in the periphery of the gear wheel 75 and the friction will hold it set. The pinions 74 and 79 are of the same size, with the result that when the pinion 74 is carried by the shaft along the periphery of the gear wheel 7 5, until it strikes the pinion 79, the

two pinions will become locked at the moment of striking, because they tend to revolve in opposite directions, and at the same time tend to revolve on the gear wheel 75. The idle run of the pinion 74 along the gear wheel 75, thus provides means whereby the uniform stroke of the' general operator 17 may be caused to give the belt 18 any desired length of stroke within the limits of travel of the general operator. A suitable spring 79 is provided within the drum 77 constantly tending to return the gear 75, thus always taking up the slack of the belt 18 to prevent it from getting tangled in the mechanism.

The belt 18 draws on the typewriter carriage throughthe medium of the ordinary line-space lever 80 of the usual Underwood typewriting machine, as best shown in Fig. 10, with the result that when the general operator draws on the belt 18, it first line spaces the platen 5 and then draws back the typewriter carriage. The line-spacing mechanism isprovide'd with the usual variable adjustment found in the Underwood typewriting machine.

In order to provide for manual operation of the carriage-return by the shaft 72, means are provided for breaking the connection be tween the motor and the general operator,

so that whenso disconnected, a handle 81 the main drive shaftof the mechanism on abracket'82. The casing is :usually supported to hold the slide 54: in place inthe yoke 52 by -a cam 83 provided walla handle 84, which may beswung to engage.- the casing of-the slide 54:as shownin Fig. -3.= When swung downwardly, thecam 83 no longer.

supports said casing and allows the slide 5ft to drop clear of the yoke 52. Said cam is pivoted in a bracket 85 dependent from the frame of the machine support.

Variations may be resorted to withinithe Having thus'described my invention, I claim: I

1. In a typewriting machine, the combination with typewriting keys and a traveling carriage,of a motor for returning said carriage, a member driven 'by sa1dmotor having a uniform stroke, and variable means'whereby the uniform stroke member may return the carriage.

2. In a typewriting machine, the combination with typewriting keys and a traveling carriage, of a motor for returning said carriage, a member driven by sa1d motor having a uniform stroke, variable means whereby the uniform stroke member may return the carriage, a belt between said motor and said carriage, and means for constantly tensioning said belt.

3. In a typewriting machine, the combination with typewriting keys and. a traveling carriage, of a normally idle motor, a member having a uniform stroke driven by said motor, means between said carriage and said uniform stroke member, whereby the carriage may be returned to a variable extent, a key for starting said motor, and means controlled from said key whereby said motor is disconnected at the end of the stroke of said uniform stroke member.

4. In a typewriting machine, the combination with numeral keys and a traveling carriage, of a motor for returning said carriage, a key for starting sald motor, means whereby the starting of the motor establishes connection between the motor and the carriage, means whereby the motor is automatically disconnected, a circuit for said motor which is broken after predetermined revolutions of said motor, and a device between said motor and said carriage whereby I the carriage is positively driven to a variacarriage, means whereby the motor is automatically disconnected, a circuit for said motor which is broken after predetermined revolutions of said motor, a device between said motor and said carriage whereby the carriage is positively driven to a variable extent, a belt between said motor and said carriage, and means for constantly tensioning' said belt.-

-6.- In a: typewriting machine, the combination with a travelingcarriage and a motor for returning said carriage, of means whereby the motor starts free of load, and means :whereby the starting of the motor establishes connection between the motor scope of'the invention, and portionsiof the. improvements may be used without others.

and the-carriage.

'7."In;a typewriting machine, the combination with-'a traveling carriage and a mo tor'for returning said carriage, of means whereby the motor starts free of load, means whereby the starting of the motor establishes connection between the motor and the ing said belt.

8. In a typewriting machine, the combination with a traveling carriage and a motor for returning said carriage, of means whereby the motor starts free of load, means whereby the" starting of the motor establishes connection between the motor and the carriage, a member having a uniform stroke between said motor and said carriage to automatically disconnect said motor from said carriage and to break the current driving said motor, and means between said uniform stroke member and said carriage for varying the amount of return of said carriage.

9. In a typewriting machine, the combination with a traveling carriage and a motorfor returning said carriage, of means whereby the motor starts free of load, means whereby the starting of the motor establishes connection between the motor and the carriage, a member having a uniform stroke between said motor and said carriage to automatically disconnect said motor from said carriage and to break the current driving said motor, means between said uniform nation with a traveling carriage and a mo tor for returning said carriage, of a belt for for so returning it, means for holding the belt constantly tensioned, means whereby the motor is automatically disconnected after a given number of revolutions, and means for varying the amount of said carriage return independently of said number of revolutions.

11. In a typewriting machine, the combination with a traveling carriage and a motor for returning said carriage, of a belt for so returning it, means for holding the belt constantly tensioned, means whereby the motor is automatically disconnected after a given number of revolutions, means for varying the amount of said carriage return independently of said number of revolutions, and means for breaking the current from said motor automatically.

12. The combination with a traveling carriage, of a power-driven member having a uniform reciprocating stroke, a carriage return band drawn by said reciprocating member, a drum on which said band is wound, a gear wheel for driving said drum from said reciprocating member, and a clutch intermediate said drum and said reciprocat ing member for determining how far said reciprocating member shall turn said drum.

13. The combination with a traveling carriage, of a power-driven shaft, means for giving said shaft a single complete revolution at intervals, a return band connected to said carriage, a drum on which said return band is wound, and a clutch for driving said drum from said shaft a predetermined adjustable portion of said shaft revolution.

14L. The combination with a traveling carriage, of a source of power, a shaft, means for turning said shaft to uniform extents by said source of power and then automatically disconnecting it, a return belt for said carriage connected to be drawn by said shaft, and means for varying the amount said shaft shall draw on said belt at each operation of said shaft.

FREDERICK A. HART.

Witnesses:

W. O. WESTPi-IAL, J ULIUS, DUOKSTINE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

